We need the diameter-measurement for each of your bullets, m'friend... not just their length.
Without knowing their exact diameter, but "guess-timating" their diameter by comparing the bullet's width with the scale visible nearby on your caliper, all I can say about their possible ID is, some look like an 1866 Government .50-70 bullet, and some like a Model-1873 Springfield .45-70 bullet. All of those were used by post-civil-war yankee Occupation troops, whom we know were stationed in your area.
.50-70 Government - Wikipedia